E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL MODEL:L192WS-BNQ/SNQ. A**JQP/ A**QQP ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the MSTAR Chip.
PRECAUTION WARNING WARNING FOR THE SAFETY-RELATED COMPONENT. BE CAREFUL ELECTRIC SHOCK ! • There are some special components used in LCD monitor that are important for safety. These parts are • If you want to replace with the new backlight (CCFL) marked on the schematic diagram and or inverter circuit, must disconnect the AC...
SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this 9. Use with this receiver only the test fixtures specified in service manual and its supplements and addenda, read this service manual. and follow the SAFETY PRECAUTIONS on page 3 of this CAUTION: Do not connect the test fixture ground strap publication.
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General Soldering Guidelines Replacement 1. Carefully insert the replacement IC in the circuit board. 1. Use a grounded-tip, low-wattage soldering iron and 2. Carefully bend each IC lead against the circuit foil pad appropriate tip size and shape that will maintain tip and solder it.
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Circuit Board Foil Repair At Other Connections Excessive heat applied to the copper foil of any printed Use the following technique to repair the defective copper circuit board will weaken the adhesive that bonds the foil to pattern at connections other than IC Pins. This technique the circuit board causing the foil to separate from or involves the installation of a jumper wire on the component side of the circuit board.
TIMING CHART VIDEO SYNC Front Back distingishme Frequency Total period Display Sync. CLOCK Polority Porch Porch Resolution [kHz]/ [Hz] [MHz] 25.175 31.469 H(Pixels) 640 x 350 V(Lines) 70.8 H(Pixels) 28.321 31.468 720 X 400 V(Lines) 70.09 H(Pixels) 25.175 31.469 640 x 480 V(Lines) 59.94 H(Pixels)
DISASSEMBLY Put a soft cushion on the desk and lay the stand on Twist the stand assy until “click” , then take out the its side so that the base is accessible. stand assy into the product in the correct direction as shown in picture. Pry the hinge cover by flat-tip screw driver or jig and Unscrew the 4 screws on the hinge to separate the be careful to prevent from scratching the hinge...
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Pull out the lamp wire. Pull out the LVDS cable...
BLOCK DIAGRAM L192WS consists of a main body and a stand (base). The main body contains a InnoLux (or CMO) LCD module with 4 CCFL lamps, a power board (includes AC/DC, DC/DC, inverter and panel power source), a control board (key pad) and an interface board. The block diagram is shown as below. InnoLux TFT-LCD Module with 4FFCLs 128KB Flash ROM LVDS Transmitter...
DESCRIPTION OF BLOCK DIAGRAM 1. Video Controller Part. This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the digital video signal using a pixel clock. The pixel clock for each mode is generated by the PLL. The range of the pixel clock is from 25MHz to 135MHz. This part consists of the Scaler, ADC convertor and LVDS transmitter.
LIPS Board Block Diagram 50~60Hz Operation description_LIPS 1. EMI components. This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR, the circuit included a line-filter, across line capacitor and of course the primary protection fuse. 2.
ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 1.
SERVICE OSD 1) Turn off the power switch at the front side of the display. 2) Wait for about 5 seconds and press MENU, POWER switch with 1 second interval. 3) The SVC OSD menu contains additional menus that the User OSD menu as described below. a) Auto Color : W/B balance and Automatically sets the gain and offset value.
TROUBLESHOOTING GUIDE 1. No Power & Power LED Off No power Check IC802, Check circuit Check primary C805, T801 if short rectifier voltage Check F801, P801, D801 Check pin3 of Check R801, R805, IC802 voltage R822, R823, R817 about 1V Check R803, R807, Check pin2 of IC802 R824, R825...
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2. Backlight can’t be turned on No raster? LED Green? Backlight can’t be turned on. Check power Is there 5Vdc supply voltage on pin2 of IC501? Check I/F Is there high-level voltage Is Ok R526? board on pin10 of IC501? R526 open Are connected rightly Connecting the...
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3. DC output voltage is unstable Output Voltage Unstable Check Check ZD801, ZD802, Check circuit if Q801 below 0.3V short ZD803, D803, D805 Check Q801, Q802 Check Pin R of Check R809, R814, Check reference IC801, R818 IC803 voltage voltage about 2.5V Check R810, R811 Check C815, D806,...
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4.Output power is unstable Unstable power Check R810, Check sampling R811, R818 Circuit Change R810, R811, R818 Check the C pin Check the R pin Change voltage of IC803 voltage of IC803 IC803 if 3V about 2.5V Check R809, R808, R814, D809 Check pin1 of Check D806, C815 if...
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5.Black Screen and backlight turn on Black Screen Check power supply: Power Fail Pin1, 2 of CN101 Check FB103 Check pin34, 51, 66, and 82 And U102 Of U105 Check FB106 Check pin32, 49, 56, and 75 And U101 Of U105 Check Reset (pin84) Check C144, R172 Of U105...
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6.White Screen White Screen LVDS Cable Workmanship Reinsert Change LVDS LVDS Cable NG Cable Check VLCD Check LVDS Panel Fail Is 5V? Signals Check Panel - Enable Check the HW Reset Check C144 Of U105 (pin48) is High? Of U105 pin84 ,R172 Check R168, R105 Q103, Q101...
7. BAD SCREEN Bad Screen LVDS Cable Reinsert Workmanship Change LVDS Cable LVDS Cable NG Check Crystal:Pin96,97 Check :X101, Of U105 C153,C154 Check the communication Check: SDO,SCZ, Of U105 and U106 SCK,SDI, Reset Check the pins of U105 and U106...
REPLACEMENT PARTS LIST BEFORE REPLACING ANY OF THESE COMPONENTS, CAUTION: READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE S SAFETY Mark ALTERNATIVE PARTS Power and Inverter PCBA Board Item Location Description 790841400600R PCBA,P/I BOARD,LE1957-610 ROHS IC801, 412140002380R IC LTV817M-PR VDE (LITE-ON) P=10mm RoHS 412140001390R IC EL817M-B(EVERLIGHT)RoHS U501,U502,...